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paintball setup and damage shots, interchangeable barrels

Built a pneumatic cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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paintball setup and damage shots, interchangeable barrels

Unread postAuthor: Mark256 » Sat Aug 04, 2007 5:46 pm

this is my basic cannon that i have had for a while but am posting it now because got more barrels. am currently using a 3/4 in. barrel. I have 2 in, 3/4 in, and 1/2 in.
I loaded the cannon up and pumped it to 90 PSI shot the jug and it rolled about 5 times. the paintball went through the front and dented/cracked the back of the jug.

it is my trophy

my cannon
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string that makes paintballs not fall in the valve
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front of milk jug
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front i like cub nothing personal
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back of jug bulge
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after the paintball went through the front it made a crack and a bulge in the back of the jug
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back of jug again
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cracked an old child pool(paintball marker has never done that after tons of shots)
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Last edited by Mark256 on Sat Aug 04, 2007 6:07 pm, edited 2 times in total.

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Unread postAuthor: jrrdw » Sat Aug 04, 2007 6:00 pm

Thats because after mutible shots the target got weakened and split. Great cannon. Any plans on a paint job?
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Unread postAuthor: iknowmy3tables » Sat Aug 04, 2007 6:35 pm

3/4pvc doesn't fit paint balls as well as 3/4cpvc or sch80 nice gun looks sturdy
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Unread postAuthor: Mark256 » Sat Aug 04, 2007 7:43 pm

i was pretty impressed from the damage of a paintball and 40 PSI seems like it was about 400 FPS because it more then a pantball marker thats why i shoot the cannon at 90 PSI

P.S. anybody know how to make the paintball not roll out of the barrel when you point the cannon down.
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Unread postAuthor: trae08 » Sat Aug 04, 2007 7:51 pm

inject it with mercury and hold a neodymium magnet on the outside of the barrell?


iknowmy3tables wrote:3/4pvc doesn't fit paint balls as well as 3/4cpvc or sch80 nice gun looks sturdy

i wish i woulda known that 6 hours ago.!!
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Unread postAuthor: potatoflinger » Sat Aug 04, 2007 8:03 pm

You could put a small piece of a paper towel in front of the paintball to keep it from rolling out of the barrel. That is a great looking gun too. :D
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Unread postAuthor: Marco321 » Sat Aug 04, 2007 9:02 pm

Mark256 wrote:P.S. anybody know how to make the paintball not roll out of the barrel when you point the cannon down.


For marbles i used a slim bit of foam glued into the barrel. I have never shot a paintball so I'm not sure if the small obstruction will break the paintball.

If you make a breach loader, i have seen people place an o-ring over the opening so it blocks the paintball from moving forward, this was on a homemade paintball gun on the website.

EDIT: Nice gun by the way, looks fun to shoot.
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Unread postAuthor: Modderxtrordanare » Sat Aug 04, 2007 9:39 pm

Mark256 wrote:P.S. anybody know how to make the paintball not roll out of the barrel when you point the cannon down.


Get lower to the ground instead? :?
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Unread postAuthor: spud yeti » Sun Aug 05, 2007 2:04 am

P.S. anybody know how to make the paintball not roll out of the barrel when you point the cannon down.


I got this from someone on the forums (cant remember who) and it works great.
Drill a tiny hole in the pipe. Cut some bristles from a toothbrush, put them in the hole. Make sure they go in about 1/3 of the way. Now just hot glue it in. You can experiment with the amount of bristles and the distance they go into the pipe.

Great cannon by the way.
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really good quote/phrase here
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Unread postAuthor: PinHead » Sun Aug 05, 2007 9:45 am

Alot of paintball guns like Spyders use that same concept... they simply call it a "ball detent". Most of them are just a simple rubber bumper that gets pushed out of the way when the ball goes thru; same thing essentially.
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Unread postAuthor: spud yeti » Sun Aug 05, 2007 9:51 am

Paintball guns use metal half balls with a weak spring that gets pushed back too.
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really good quote/phrase here
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Unread postAuthor: Mark256 » Mon Aug 06, 2007 9:28 am

I put a lining of foam medical tape on the inside of the barrel at the bottom end so when you drop the paintball in it gets lodged perfectly in the foam.

works great.

any other tape probably would have worked too but my mom had foam tape so i used it.

the brush idea seems pretty good too.
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Unread postAuthor: Mark256 » Mon Aug 06, 2007 10:33 am

picture of the foam tape lining
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Unread postAuthor: spud yeti » Mon Aug 06, 2007 10:35 am

Yeah, that looks like a decent plan. How thick is the tape?
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really good quote/phrase here
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